Round/TurnA round is six seconds actual
time and a turn is ten rounds. These terms will be used to talk about
aspects such as how long it takes to cast a spell or how many attacks
a characters has per round. You don't need to know these but it's very
helpful if you want to get into the game and understand it better.

THAC0This acronym stands for "To
Hit Armor Class 0" which is basically how much your character needs
to roll to get a successful attack. A lower THAC0 is better than a higher
THAC0. Basically the computer rolls a 20 sided die in the background and
if your character's THAC0 is better than this number then he will get
a successful hit on someone whose AC is 0. If the person has a different
AC then subtract or add accordingly. For example if your character has
a THAC0 of 10 and you're facing a monster with an AC of -4 then you will
need to roll a 14 or better to hit that monster. If you have a THAC0 of
-1 and you're facing a monster with an AC of 5 then you will need to roll
a -6 or better to hit the monster. You'll always hit this monster unless
you roll a 1 which is always a miss (Critical miss). A roll of 20 is always
a hit (Critical hit).

Armor Class (AC)This means the amount of defense
your character has. It is rated from 10 (The worst) to -10 (The best)
(Please note: AC can get below -10 with special armor and items). There
are many ways to lower it such as wearing armor, shields, certain bracers
as well as other magical items such as Rings of Protection. Having many
points in dexterity also improves your Armor Class. There will be a small
shield icon in your inventory screen which displays your current Armor
Class.

Level DrainSeveral creatures can level drain your character. To avoid
this, use the priest spell Negative Plane Protection. To negate the effects
of this, one can use a scroll of Restoration, the Cleric spell Restoration
or try the services of a temple.

StrongholdsDepending on your class, your character will get a chance
to manage a stronghold. The stronghold gives you a chance to get more
experience points, make money or even make custom items. For all strongholds,
a quest must be completed to obtain it.
Fighter : Nalia's Keep
Ranger : Ranger's Cabin at Umar Hills
Paladin : Be a part of The Order of the Radiant Heart in the Temple District
Cleric : Depending on what type of cleric, you will get to manage a temple
in the Temple District
Druid : Druid Grove
Thief : Mae'Var's Guildhall in the Docks District
Bard : Five Flagoons in the Bridge District
Mage : Planar Sphere
Sorcerer : Planar Sphere
Barbarian : Nalia's Keep
Monk : Nalia's Keep

Magic Resistance (MR)Magic Resistance is a way for a character to avoid the
effects of magic. It is measured from 0-100, although you can have MR
higher than 100. Monks and Wizard Slayers get MR as the progress in levels.
Also certain monsters like Wolfweres and Dragons have high magic resistance.
The wizard spell Lower Resistance lowers MR temporarily.